AI Insight
Ancient DNA analysis has revealed that plague bacteria infected and killed hunter-gatherer populations in Siberia approximately 5,500 years ago, predating the emergence of cities and the flea-transmitted epidemics like the Black Death by thousands of years. These prehistoric plague strains contained genetic factors that could trigger severe immune responses in infected individuals, potentially making them particularly lethal. This discovery pushes back the timeline of plague's impact on human populations to a period before agricultural settlements and urban centers existed.
Why it matters
This finding changes our understanding of how long plague has been affecting human populations and suggests that deadly infectious diseases were a significant threat even to small, dispersed hunter-gatherer groups. Understanding the genetic factors that made ancient plague strains virulent could inform modern research on immune responses to bacterial infections and epidemic diseases.
Understand the Science
Ancient DNA reveals that plague was already killing hunter-gatherers in Siberia 5,500 years ago, long before cities and flea-driven epidemics. The prehistoric strains may have been especially dangerous because they carried a genetic factor capable of provoking severe immune reactions.
Source: Plague was killing entire families thousands of years before the Black Death